Magneto-optical current transformer of high bandwidth and large temperature range
| Autor: | Fritz Haberl, Hans Hauser, Y.S. Didosyan |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Physics
Orthoferrite Birefringence business.industry Metals and Alloys Atmospheric temperature range Condensed Matter Physics Polarization (waves) Current transformer Surfaces Coatings and Films Electronic Optical and Magnetic Materials symbols.namesake chemistry.chemical_compound Amplitude Optics chemistry Faraday effect symbols Current sensor Electrical and Electronic Engineering business Instrumentation |
| Zdroj: | Sensors and Actuators A: Physical. 92:67-73 |
| ISSN: | 0924-4247 |
| DOI: | 10.1016/s0924-4247(01)00541-6 |
| Popis: | In the majority of magneto-optical current transformers developed to date, the main parameter is the angle of light polarization (Faraday rotation). In contrast, the principle of operation of the new sensor is based on the direct registration of the domain wall (DW) positions in an orthoferrite plate. The results of the measurements are not affected directly (but the signal-to-noise ratio) by temperature changes of Faraday rotation, birefringence, fluctuations of the incident light beam, polarization distortions in fibers, etc. The amplitude of domain wall motion remains constant in the range from dc to hundreds of kHz and decreases two times at 5 MHz. In the temperature range from 20 to 130°C, the domain wall mobility and the bandwidth decrease about three times. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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